Revolving turret.



i .Pate'nted Oct. 28, 1902. P. HICHBRN 8|. A. 0. BSTRM.

REVLVING TURRE'T.

(Applicstipn led Apr. 15, 1901.)

(No Model.)

A TTOHN E YS UNITED STATES PATENT CEEICE.

PHILIP I-IICIIBCRN AND AUGUST O. BOSTRCM, F IVASI'IINGTON, DISTRICT OF COLUMBIA.

'REvoLvlNe TURRET.

SPECIFICATION forming part of Letters Patent No. 7 11,967, dated October 28, 1902.

Application filed April 15, 1901.

T0 all whom it may 0072/007472:

Be itknown that We, PHILIP HICHBORN and AUGUST O. BOsTROM,residing in Washington, in the District of Columbia, have made certain new and useful Improvements in Revolving Turrets, of which the following is a specication.

Ve have invented and designed an improved revolving turret adapted for large and Io smaller caliber guns, the same being of the double or superposed type.

In carrying out our invention we design the turret in two partly-elliptical parts differing in size and arrangement, the smaller part or gun-chamber being superposed on the other or base part and also placed back from the 'front of the latter and both having sloping fronts.

The details of construction and arrangezo ment are illustrated in the accompanying drawings, in Which- Figure l is a central vertical section of a turret embodying our invention and mounted en barbete. Fig. 2 is a plan view of such turret and its barbette.

A indicates the main or base part of the structure, B the smaller or superposed part, and C the circular barbette. The main part A is distinguished by important features- 3o namely, it is oval or elliptical in horizontal section and provided with au ovcrhanging or rear extension a, Which projects over and beyond the barbette C. The chief advantage of the oval form is that when the turret is front on it presents a smaller target to the enemy, and the eect of a projectile striking upon its inclined sides is minimized.

The overhang a, which has armor of less thickness than the front portion, counterbal- 4o ances more or less perfectly the weight of the guns, which are hung near the front. It also provides space for the gunners and the mechanical rammer in rear of the guns, and, further, it provides a convenient and ordinarily safe place of entrance and exit for the gunners outside the barbette. For this purpose a ladder is pendent from the overhang a Serial No. 55,847. (No model.)

Where an opening is formed in the turretiioor.

The smaller superposed part B of the tur- 5o ret is similar to the base A in general form and arranged symmetrically thereon. Its rear Wall or overhang d is vertically parallel with the corresponding part CL of the base, and its front o2, which meets and rests on the top of the i'ronta2 of the base A, is inclined backward at a slightly-greater angle, so that the two fronts a2 b2 have a slightly-obtuse angle to each other. The sloping fronts a2 b2 are each iiat or in one plane instead of being 6o curved or convex, as usual in other turrets of the Hichborn type, whereby greater space is provided for the gunners at the side angles of the respective gun-chambers, Where sighting-hoods are arranged, as shown in Fig. 2. The base part A has two such hoods as exterior to the superposed part I3, and the latter has three hoods b3.

- being elliptical and having an inclined front 8o formed at an obtuse angle, substantially as shown and described.

A revolving turret mounted en bmbcte, and consisting of a main or base portion and a smaller superposed part, both being elliptical and having a sloping front and vertical rear portion which overhangs the barbette and serves as a counterbalance, substantially as shown and described.

PHILIP HICHBORN. AUG. O. BOSTRCIWI. Vtitnesses:

AMos W. HART, SoLoN O. KEMoN. 

